THz pulse guidance in hollow core fibers with embedded indium wires

We demonstrated THz pulse propagation through hollow core fibers with two or four embedded indium wires. In the frequency range from 0.65 to 1.05 THz, the attenuation coefficient was measured to be 0.3 cm^-1 in average for the two-wire and 0.4 cm^-1 for the four-wire configuration, respectively. The low dispersion characteristics predicted by numerical simulations agrees well with the experimental measurements for both of the fibers.